Mapping chromosomal regions affecting flowering time in a spring wheat RIL population

Lin, Feng; Xue, Shulin; Tian, Dagang; Li, C. J.; Cao, Yunshan; Zhang, Z. Z.; Zhang, C. Q.; Ma, Zhengqiang

doi:10.1007/s10681-008-9724-3

Cited by 36 publications

(16 citation statements)

References 38 publications

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“…Many QTLs for flowering time were revealed in different regions of individual chromosomes, especially on chromosomes of groups 2 and 5 near the Ppd and Vrn genes (Lin et al 2008). In this study, the detected QTLs were found in the same chromosome regions as in previous studies (Kirwigi et al 2007;Kuchel et al 2007).…”

Section: Association Analysissupporting

confidence: 79%

Detection of QTLs for important agronomical traits in hexaploid wheat using association analysis

Brbaklić¹,

Trkulja²,

Kondić‐Špika³

et al. 2013

Czech J. Genet. Plant Breed.

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Brbaklic L., Trkulja D., Kondic-Spika A., Treskic S., Kobiljski B. (2013): Detection of QTLs for important agronomical traits in hexaploid wheat using association analysis. Czech J. Genet. Plant Breed., 49: 1-8.One of the main wheat breeder's goals is determining specific genomic regions which control important agronomical traits. Association analysis is a new strategy with high resolution in plant molecular breeding that could be used to improve the efficiency of marker assisted selection (MAS) for finding important QTLs (quantitative trait loci) or genes. A set of 96 diverse wheat genotypes was phenotypically measured during three growing seasons (2006/07, 2007/08, 2008/09). Microsatellite markers located near important QTLs were carefully chosen in accordance with existing literature data to validate marker trait associations (MTA). Genomic DNA was extracted using the CTAB method and PCR products were separated by capillary electrophoresis. The population structure was assigned based on molecular data in Structure v. 2.0 software, while association analysis was done by the Tassel program using the Q matrix. Nine significant associations were stable in all years investigated and eight MTA were detected to be significant in two growing seasons. Microsatellite markers which showed significant associations and stability in different seasons can be useful and suitable for marker assisted selection (MAS) in Serbian wheat breeding programs.

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Section: Association Analysissupporting

confidence: 79%

Detection of QTLs for important agronomical traits in hexaploid wheat using association analysis

Brbaklić¹,

Trkulja²,

Kondić‐Špika³

et al. 2013

Czech J. Genet. Plant Breed.

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“…The QTL for DTH (QEet.fcu-2B) mapped to the short arm of 2B, where the photoperiod sensitivity gene Ppd-B1 is known to be located in common wheat (Mohler et al 2004) making it possible that the earliness effects contributed by PI 41025 at QEet.fcu-2B are due to allelic variation in that gene. Finally, the DTH QTL on 1B (QEet.fcu-1B) mapped near the distal end of the long arm where Lin et al (2008) detected a QTL for flowering time in common wheat thus suggesting the possibility that the 1BL QTL detected in our research is the same.…”

Section: Days To Headingmentioning

confidence: 53%

Analysis of agronomic and domestication traits in a durum × cultivated emmer wheat population using a high-density single nucleotide polymorphism-based linkage map

et al. 2014

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Development of a high-density SNP map and evaluation of QTL shed light on domestication events in tetraploid wheat and the potential utility of cultivated emmer wheat for durum wheat improvement. Cultivated emmer wheat (Triticum turgidum ssp. dicoccum) is tetraploid and considered as one of the eight founder crops that spawned the Agricultural Revolution about 10,000 years ago. Cultivated emmer has non-free-threshing seed and a somewhat fragile rachis, but mutations in genes governing these and other agronomic traits occurred that led to the formation of today's fully domesticated durum wheat (T. turgidum ssp. durum). Here, we evaluated a population of recombinant inbred lines (RILs) derived from a cross between a cultivated emmer accession and a durum wheat variety. A high-density single nucleotide polymorphism (SNP)-based genetic linkage map consisting of 2,593 markers was developed for the identification of quantitative trait loci. The major domestication gene Q had profound effects on spike length and compactness, rachis fragility, and threshability as expected. The cultivated emmer parent contributed increased spikelets per spike, and the durum parent contributed higher kernel weight, which led to the identification of some RILs that had significantly higher grain weight per spike than either parent. Threshability was governed not only by the Q locus, but other loci as well including Tg-B1 on chromosome 2B and a putative Tg-A1 locus on chromosome 2A indicating that mutations in the Tg loci occurred during the transition of cultivated emmer to the fully domesticated tetraploid. These results not only shed light on the events that shaped wheat domestication, but also demonstrate that cultivated emmer is a useful source of genetic variation for the enhancement of durum varieties.

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“…Interestingly, we found the epistatic interaction could be in either coupling phase or in repulsion phase, depending on the locus, suggesting that some loci are co-adapted during domestication/speciation and that loci favorable for breeding purpose may exist in both improved cultivars and landraces. In other plant species including, soybean [16,17], oilseed brassica [18] and wheat [19], epistatic control of flowering time and leaf senescence has been reported. In the near future, it is required to validate and fine-dissect the epistatic QTLs under more uniform environments such as greenhouses.…”

Section: Discussionmentioning

confidence: 99%

QTL mapping and epistatic interaction analysis in asparagus bean for several characterized and novel horticulturally important traits

Wang

et al. 2013

BMC Genet

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BackgroundAsparagus bean (Vigna. unguiculata. ssp sesquipedalis) is a subspecies and special vegetable type of cowpea (Vigna. unguiculata L. Walp.) important in Asia. Genetic basis of horticulturally important traits of asparagus bean is still poorly understood, hindering the utilization of targeted, DNA marker-assisted breeding in this crop. Here we report the identification of quantitative trait loci (QTLs) and epistatic interactions for four horticultural traits, namely, days to first flowering (FLD), nodes to first flower (NFF), leaf senescence (LS) and pod number per plant (PN) using a recombinant inbred line (RIL) population of asparagus bean.ResultsA similar genetic mode of one major QTL plus a few minor QTLs was found to dominate each of the four traits, with the number of QTLs for individual traits ranging from three to four. These QTLs were distributed on 7 of the 11 chromosomes. Major QTLs for FLD, NFF and LS were co-localized on LG 11, indicative of tight linkage. Genome wide epistasis analysis detected two and one interactive locus pairs that significantly affect FLD and LS, respectively, and the epistatic QTLs for FLD appeared to work in different ways. Synteny based comparison of QTL locations revealed conservation of chromosome regions controlling these traits in related legume crops.ConclusionMajor, minor, and epistatic QTLs were found to contribute to the inheritance of the FLD, NFF, LS, and PN. Positions of many of these QTLs are conserved among closely related legume species, indicating common mechanisms they share. To our best knowledge, this is the first QTL mapping report using an asparagus bean × asparagus bean intervarietal population and provides marker-trait associations for marker-assisted approaches to selection.

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Mapping chromosomal regions affecting flowering time in a spring wheat RIL population

Cited by 36 publications

References 38 publications

Detection of QTLs for important agronomical traits in hexaploid wheat using association analysis

Detection of QTLs for important agronomical traits in hexaploid wheat using association analysis

Analysis of agronomic and domestication traits in a durum × cultivated emmer wheat population using a high-density single nucleotide polymorphism-based linkage map

QTL mapping and epistatic interaction analysis in asparagus bean for several characterized and novel horticulturally important traits

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